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Mariana [72]
3 years ago
8

The figure below shows triangle NRM with r2 = m2 + n2:

Mathematics
2 answers:
artcher [175]3 years ago
7 0

Answer: Square Root Property of Equality

Step-by-step explanation:

If we have an equation with a perfect square on both sides , then Square Root Property of Equality says that we can take square root on both the sides to solve the equation and the equality remains same.

From the given proof , the statement 3. gives  f^2=r^2

Then by applying Square Root Property of Equality, we can take square root on both sides, we get

f=r which is the statement 4.

Hence, the correct answer is "Square Root Property of Equality".

inna [77]3 years ago
3 0

Answer:

The correct answer is square root property of equality.

Step-by-step explanation:

Triangle NRM has legs m and n and r is the length of its longest side.

Ben constructed a right triangle EFD with legs m and n and hypotenuse f.

It means that both the triangles have legs with sides m and n beside that the third side of NRM is equal to the third side EFD, i.e ⇒ f =r(statement 4) which is proved by the square root property of equality.

Thus the correct option is  square root property of equality....

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What is 3/10 divided by 4/5
Ray Of Light [21]
3/10 divided by 4/5
You can solve this problem by changing the second fraction and multiplying. 3/10 times 5/4 is 15/40 = 3/8
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Given the point and its image, determine the scale factor. B(2,5) B'(1,2.5) 0 -1/2 02 0-2 O 1/2​
fiasKO [112]

Given:

The point is B(2,5) and its image is B'(1,2.5).

To find:

The scale factor.

Solution:

If a figure is dilated by the scale factor k and (0,0) is the center of then the scale factor is defined as

k=\dfrac{\text{x-coordinate of the point on image}}{\text{x-coordinate of the corresponding point on the original figure}}

x-coordinate of point B' is 1 and the x-coordinate of point B is 2. So, the scale factor is

k=\dfrac{1}{2}

Therefore, the scale factor is  \dfrac{1}{2} and the correct option is D.

7 0
3 years ago
Ejercicio Nº 4 Desde la parte superior de un acantilado de 80 metros de altura se dispara horizontalmente una piedra a razón de
vaieri [72.5K]

Answer:

1) La piedra permanece en el aire en 4 segundos.

2) La piedra alcanza una distancia horizontal de 32 metros.

3) La velocidad de la piedra con la que alcanza el suelo es aproximadamente 40.792 metros por segundo.

Step-by-step explanation:

El problema nos indica un caso de tipo parabólico, el cual consiste en la suma de un movimiento horizontal a velocidad y un movimiento uniforme acelerado por la gravedad desde el reposo.

1) El tiempo total que la piedra permanecería en el aire es tiempo requerido entre la parte superior del acantilado y el fondo. La ecuación cinemática que vamos a utilizar es la siguiente:

y = y_{o} + v_{o,y}\cdot t +\frac{1}{2}\cdot g \cdot t^{2} (Ec. 1)

Donde:

y_{o} - Altura inicial, medida en metros.

y - Altura final, medida en metros.

v_{o,y} - Velocidad vertical inicial de la piedra, meadida en metros por segundo.

g - Aceleración gravitacional, medido en metros por segundo al cuadrado.

t - Tiempo, medido en segundos.

Si sabemos que y_{o} = 80\,m, v_{o,y} = 0\,\frac{m}{s} y g = -10\,\frac{m}{s^{2}}, entonces encontramos la siguiente función cuadrática:

-5\cdot t^{2}+80 = 0 (Ec. 2)

El tiempo en el que la piedra permanece en el aire es:

t = 4\,s

La piedra permanece en el aire en 4 segundos.

2) La distancia horizontal es descrita por la siguiente fórmula cinemática:

x = x_{o}+v_{o,x}\cdot t (Ec. 3)

Donde:

x_{o} - Posición horizontal inicial, medido en metros.

x - Posición horizontal final, medido en metros.

v_{o,x} - Velocidad horizontal inicial de la piedra, medida en metros por segundo.

Si sabemos que x_{o} = 0\,m, v_{o,x} = 8\,\frac{m}{s} and t = 4\,s, entonces la distancia horizontal alcanzada por la piedra es:

x = 0\,m + \left(8\,\frac{m}{s}\right)\cdot (4\,s)

x = 32\,m

La piedra alcanza una distancia horizontal de 32 metros.

3) En primer lugar, determinamos los componentes vertical y horizontal de la velocidad final de la piedra por medio de las siguientes fórmulas cinemáticas:

Velocidad final horizontal (v_{x}), medida en metros por segundo.

v_{x} = \frac{x-x_{o}}{t} (Ec. 4)

Velocidad final vertical (v_{y}), medida en metros por segundo.

v_{y} = v_{o,y}+g\cdot t (Ec. 5)

Si x = 32\,m, x_{o} = 0\,m. t = 4\,s, v_{o,y} = 0\,\frac{m}{s} y  g = -10\,\frac{m}{s^{2}}, los componentes de la velocidad final de la piedra son:

v_{x} = \frac{32\,m-0\,m}{4\,s}

v_{x} = 8\,\frac{m}{s}

v_{y} = 0\,\frac{m}{s}+\left(-10\,\frac{m}{s^{2}} \right) \cdot (4\,s)

v_{y} = -40\,\frac{m}{s}

Por último, determinamos la velocidad final de la piedra por Teorema de Pitágoras:

v = \sqrt{v_{x}^{2}+v_{y}^{2}} (Ec. 6)

v = \sqrt{\left(8\,\frac{m}{s} \right)^{2}+\left(-40\,\frac{m}{s} \right)^{2}}

v \approx 40.792\,\frac{m}{s}

La velocidad de la piedra con la que alcanza el suelo es aproximadamente 40.792 metros por segundo.

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3 years ago
a baker makes 84loaves of bread but she burns 4 of them what fraction of the loaves does the baker burn? 1/88, 1/80,1/21,1/20 ..
Aleks [24]
Here is the answer to the given question above.
Given that the baker makes 84 loaves of bread, and out of the 84, she burns 4 of them. So in fraction it will be expressed in 4/84. So to know the final answer, we will simplify this fraction and we get 1/21. So the answer would be the third option. Hope this answer helps.
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Answer:

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